| Issue |
HWAHAK KONGHAK,
Vol.37, No.4, 499-503, 1999
Vol.37, No.4, 499-503, 1999
Zinc Titanate의 황화반응 특성 및 미반응핵 모델에 의한 반응속도
Sulfidation Reactivity of Zinc Titanate Sorbent and Reaction Kinetics by Unreacted Core Model
1.5 ZnO : 1.0 TiO2로 구성되어진 탈황제와 H2S의 황화반응은 전체반응속도가 물질전달저항, 내부확산저항, 화학반응 저항에 의해 지배된다는 미반응핵모델을 사용하여 설명할 수 있다. 그러나 600℃이하의 낮은 온도범위에서의 반응은 전체반응속도가 화학반응저항만으로 지배되는 특별한 미반응핵모델에 의해 설명될 수 있다. 본고에서 반응속도상수를 전체 반응속도가 화학반응저항에 의해 지배되는 미반응핵 모델식에 의해 계산하였으며, 겉보기 활성화에너지를 Arrhenius식에 의해 계상하였다. 그 결과 ZT01이 겉보기 활성화에너지는 9.010cal/mol이었고, ZT02의 겉보기 활성화에너지는 10,350cal/mol이었다.
The sulfidation reaction between H2S and a desulfurization sorbent composed of 1.5 ZnO:1.0 TiO2 can be described by the unreacted core model in which the global reaction rate is controlled by mass transfer, product layer diffusion and chemical reaction resistance. But at a low temperature like below 600℃, sulfidation reaction can be described by the special case of the unreacted core model which assumes that the global reaction rate is controlled only by the chemical reaction resistance. In this work, the reaction rate constants were determined by using this special case of unreacted core model and apparent activation energy was calculated by the Arrhenius equation. Apparent activation energies were 9.010 cal/mol(ZT01) and 10,350 cal/mol(ZT02).
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[Cited By]
- Yi CK, Cho SH, Son JE, Moon YS, Choi JH, HWAHAK KONGHAK, 39(2), 251, 2001
- Ryu HJ, Bae DH, Han KH, Lee SY, Jin GT, Choi JH, Korean Journal of Chemical Engineering, 18(6), 831, 2001
- Moon YS, Yi CK, Son JE, Ryu CK, Choi JH, Journal of the Korean Industrial and Engineering Chemistry, 16(5), 603, 2005
- Kyung DH, Kim JY, Jo SH, Park YC, Moon JH, Yi CK, Baek JI, Korean Chemical Engineering Research, 50(3), 492, 2012
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